Hi,
I am getting the below for this domain. The bcamyview.com is not a valid domain so the error is correct. How can I whitelist either the domain or IP address for the senders domain. So far I have “fixed” it by adding the IP as a trusted network which is obviosuly not ideal but fine in the short term.

NOQUEUE: reject: RCPT from dcmailrelay.zellis.com[152.114.220.10]: 450 4.1.8 donotreply@xxx.com: Sender address rejected: Domain not found; from=donotreply@bcamyview.com to=xxx@xxx.co.uk proto=ESMTP helo=<dcmailrelay.zellis.com>

Many Thanks in advance

Anyone have any ideas at all?

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2 years later

I am having this issue also. The email address does not have PTR, MX record. It is a dummy domain but it is routed from an IP which has all the PTR, MX, rDNS, DKIM records.

I have created a file /opt/mailcow-dockerized/data/conf/postfix/access_sender

The content is email.address.com OK

I postmap it by

docker compose exec postfix-mailcow postmap /opt/postfix/conf/access_sender

Then restarted it

docker compose restart postfix-mailcow

Not working for me.

I did tried using another box, with postfix running without mailcow, no issue.

Any suggestion?

Resolved. Please ignore

2 years later

I have the same issue:
I have a contact form that goes to Brevo as the SMTP relay. Brevo is not able to send to my address which coincidentally is the same domain setup in Brevo. mailcow is setup as this domain. So, I do not understand why it is bouncing.

450 4.1.8 bounces-311414302-1116923369@hl.d.sender-sib.com: Sender address rejected: Domain not found

DMARC and DKIM as well as MX records are setup. I do not have a PTR record though. Could that be the issue?

    • esackbauer

      • Community Hero
      Moolevel 432
    • Post #6

    Marigold68 I do not have a PTR record though. Could that be the issue?

    Most likely yes.

      why would the server care about it’s own domain? I also added the stmp relay (brevo) ip to the access_sender file but that did not seem to solve anything.

      • esackbauer

        • Community Hero
        Moolevel 432
      • Post #8

      the remote server is caring about your domain!

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